Wal-Mart's insurance company has offered a settlement to a North Texas grandmother after she took her SUV to Wal-Mart for a routine oil change and returned to find it had been totaled. Two weeks ago, a Wal-Mart automotive technician drove her SUV into a wall. The technician said the throttle stuck, and he ran into the wall to avoid hitting another employee. Roberta Slayton, of Midlothian, said the retail chain's insurer is offering $3,200, the estimated value of her 1998 Ford Expedition, plus fees for a rental car. But Slayton said she can't replace the vehicle for that amount.